I want to translate a long text and I am looking for a software that shows the text and the translation I write at the same time, in two windows and with possibly a synchronization. Does it exist? Otherwise, what are the existing softwares and what do they do ?

PS: I want to translate a 250 page book... I am not looking for a software that does the translation, but for an nice interface where I can do the translation.

Could you expand your answer demonstrating this software being used to solve the problem of translating long text live, and ‘in two windows and with possibly a synchronization’?
– grg♦Jul 14 '18 at 11:01

How does this work for a 250 pages book?
– nohillside♦Mar 29 '16 at 19:56

You failed to read the question, where it says "I am not looking for a software that does the translation". You should delete this answer as it does not properly reflect your expertise.
– Tom GeweckeMar 29 '16 at 22:32